Shore power system for ship is promoted extensively in Chinese ports due to its benefit on reducing carbon emissions and improving energy efficiency.In order to discuss the application prospect of shore power system in container terminal,we take the Dayao Bay north shore container terminal as an example.We use the simulation model to calculate Dayao Bay north shore container terminal carbon emission in 2020 before and after using shore power system in several scenarios,such as the influence on the carbon emission in different ship loading and unloading efficiency.The results show that low carbon emission can be achieved by shore power system of container terminals.Improving the ship loading and unloading efficiency are favorable to reduce the carbon emission,but the increasing of carbon emissions of loading and unloading machines caused by the increasing of the efficiency should be considered